Process for the separation of phosphorus from phosphorus vapors



PM July 23, i929.

- UNITED, STATES rArsu rg orrics;

nmx alarm, or nannsnan; czncnostovanm.

rnoosss son was SEPARATION. or rnosrnonus no! rnosr'nonus varons.

no Drawing. ,a ncauon filed October 20, 1925, Serial a. saver, and in we. October as, 1924.

" "In the usual processes for the manufacture which have been enlarged in the first tower. 60

ot phosphorusthe separation -int the phosphorus from the phosphorus vapors formed presents great dificulty. The particles of 5 phosphorus, which are mainly present in the form of mist, other such great resistance to separation under water that it is necessary to carry out the condensation in complicated apparatus which are filled with a gas free 1 from oxygen. r

' It has now been found that the separation of the particles of phosphorus mist can be efiected in a relatively simple manner, in comparison with the costly and complicated p10c-' l5 ess hitherto em loyed, if the phosphorus vapor he subjecte one or more times to electrostatic influence, referably, after having been brought into intimate contact with a suitable liquid, for example, water.,

. Incarrying out the inventionythe hot phosphorus vapors are conducted to a suitalole washing apparatusthrough which they flow in the opposite direction to that of the liquid flowing or trickling through the apparatus'and from which'they emer e cooled at the other end while the liquid passing through the washing apparatus becomes heated therehy. The vapor which rises from the liquid, since it becomes condensed in the cooled zone,

surrounds the particles of mist as a liquid shell or envelope, enlarges them and thus enables them to be separated more easily.

By this preliminary treatment of the phosphorus vapors the result is obtained that the 3 particles of phosphorus mist are quickly and completely separated even by a single passage through an electro-static separating apparatus.

' Example.

The gases from the main phosphorus con- (lensing-plant which contain; thediflicultly separable phosphorus m ist'areled into the bottom oi a fire-clay tower which'is filled i with pebbles, sprin'kled with water and mainat a temperature above 45 C. The gases then flow into a second tower containing the apparatus necessar for the electro-stctic taine vseparation of the partic es of phosphorus mist wires or nets, which are connected alternately with the positive and negative pole of a suitable high tension plant or. circuit may be cm loyed or the separation.

claim I 1. The process for the separation of phos phorus from phosphorus-containing vapors which consists in suhjectin the vaporsafter cooling to electro-static i uence.

- 2. The process for the separation of phosphorus from phos horns-containing vapors which consists in rin ing the vapors into mtimate contact with iquid and then subjecting them to electro-static influence.

.3. The process for the separation of phosphorus from phos horas-containing vapors which consists in ringing the vapors into intimate contact withi'water and then suhjecting them to electro-static influence.

phorus from phosphorus-containing. vapors which consists in hringin t vapors into intimate contact with liqui 04. a temperature lower than that of the, vapor and then passing them through an electrostatic separator.

The process for the separation of phosphorus from phosphorus-containing vapors which consists in bringing the vapors into and then passing them through an electrostatic separator.

7. The process then passing thenithrough an electrostatic separator.

m an.

4. The process, forthe separation of phosintimate contact with water of a temperature for-the separation of phoephorus from.phosphorus-containing vapors. 

